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guajiro [1.7K]
3 years ago
13

If a is negative and b is positive, is a2b positive or negative?

Mathematics
2 answers:
Mice21 [21]3 years ago
8 0

Answer:

Negative

Step-by-step explanation:

Lets look at it with numbers!

a=-2 , b=4

a*2b is -2*2(4)  ---> -2*8 ---> -16

If you multiple a negative and a negative it will be positive, but if you multiply a positive and a negative it will be negative;

+ * + = +

+ * - = -

- * -  = +

I hope this helps!

kolezko [41]3 years ago
6 0

Answer:

negative

Step-by-step explanation:

if you are multiplying with a negative and a positive it will always be negative. if you are multiplying with 2 positives or 2 negatives it will be positive. 2 negatives equalling a positive.

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1. Adrian invests $10,000 in an account that increases by 8% each year. What is the balance in the account after 15 years?
TEA [102]

Answer:

$162000

Step-by-step explanation:

8% of 10000

10000÷100=100×8=800

10000+800=10800

10800×15=162000

6 0
1 year ago
Can you break down how to solve the problem ?
Montano1993 [528]

Answer:

A.  y  = \frac{-5x}{2} - 1

Step-by-step explanation:

Given parameters:

Equation of the line:

       5x + 2y = 12

Coordinates = -2, 4

Unknown:

The equation of the line parallel to this line = ?

  • To solve this problem, first, we need to find the slope of the given line.

     Every linear equation have the formula:  y = mx + c

     m is the slope of the line, c is the y- intercept

           5x + 2y = 12

 Express this equation as y = mx + c

                 2y = -5x + 12

                    y = \frac{-5}{2}x  + 6

The slope of this line is \frac{-5}{2}

  • Now, any line that is parallel to another will not cut or cross it at any point. This simply implies they have the same slope.

                  Slope of the line parallel is \frac{-5}{2}

  • Our new line will also take the form y=mx + c,

          Coordinates = -2, 4, x = -2 and y = 4

                     m is \frac{-5}{2}

Now let us solve for C, the y-intercept;

                     4 = - 2 x \frac{-5}{2}  + C

                      4 = 5  + C

                       C = -1

The equation of the line is therefore;

                 y  = \frac{-5x}{2} - 1

6 0
3 years ago
A number cube with faces labeled from 1 to 6 was rolled 20 times. Each time the number
aliina [53]
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3 0
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An image point has coordinates B'(7, -4). Find the coordinates of its pre-image if the translation used was (x + 4, y + 5).
Vera_Pavlovna [14]

Answer:

B

Step-by-step explanation:

B'(7, -4)

Let the pre-image coordinates be (x,y)

Consider x-coordinate,

x + 4 = 7

x = 3

Consider y-coordinates,

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pre-image coordinates is (3, -9)

8 0
3 years ago
Read 2 more answers
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mihalych1998 [28]
Which graph is the graph of this function? 

f(x)= { \frac{1}{2}x-2

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So the graph is A.


Hope i've helped!

6 0
3 years ago
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